diff --git a/deployment/requests/HLCC-NUMERIC-SHARED-MODE-PERSIST-20260806.json b/deployment/requests/HLCC-NUMERIC-SHARED-MODE-PERSIST-20260806.json
new file mode 100644
index 0000000..18d2d59
--- /dev/null
+++ b/deployment/requests/HLCC-NUMERIC-SHARED-MODE-PERSIST-20260806.json
@@ -0,0 +1,62 @@
+{
+  "schema": "guanghu.architecture-provision-request/v1",
+  "request_id": "HLCC-NUMERIC-SHARED-MODE-PERSIST-20260806",
+  "target_node": "JD-FD-PRIMARY",
+  "architecture_id": "GLS-HLCC-009",
+  "module": {
+    "code": "HLCC-JD-CANDIDATE-01",
+    "name": "光湖代码频道数值共享模式持久化",
+    "bind": "loopback:3340,3341",
+    "owner": "systemd",
+    "unit": "hlcc-jd-candidate.service",
+    "run_user": "guanghu",
+    "writable_paths": [
+      "/var/lib/guanghu/personas/guanghu/hlcc-v16.0.1"
+    ],
+    "read_only_paths": []
+  },
+  "source_ref": "REPO-012:refs/heads/main",
+  "deployed_commit_policy": "use the exact human-merged commit and record it in the server-owned deployment receipt",
+  "source_paths": [
+    "server-tools/hololake-code-channel/jd-candidate/hlcc-bootstrap.py",
+    "server-tools/hololake-code-channel/jd-candidate/app.ini",
+    "server-tools/hololake-code-channel/jd-candidate/hlcc-jd-candidate.service"
+  ],
+  "initial_provision": {
+    "kind": "new-architecture-unit",
+    "not_an_existing_action_bridge_extension": true,
+    "requires": [
+      "persist core.sharedRepository=0660 for compatibility with RestrictSUIDSGID",
+      "preserve UMask=0077 for all non-repository code-channel state",
+      "keep the obsolete recursive chmod repository hook absent",
+      "quote the generated Forgejo custom-hook basename test to prevent argument expansion warnings",
+      "restart only hlcc-jd-candidate.service",
+      "do not alter repository content, branches, owner identity or authentication"
+    ]
+  },
+  "verification": [
+    "the automatic deployment receipt records DEPLOYED_AND_VERIFIED",
+    "the candidate subsequently reaches ready=true and mode=isolated-candidate",
+    "the exact repository reports core.sharedRepository=0660",
+    "the obsolete repository chmod hook remains absent",
+    "flat branch create and delete complete without chmod or shell argument warnings",
+    "both code-channel and direct-receiver repository checks pass"
+  ],
+  "runtime_check": {
+    "url": "http://127.0.0.1:3341/health",
+    "expected": {
+      "ok": true,
+      "mode": "bootstrap",
+      "version": "16.0.1",
+      "code": "HLCC-JD-CANDIDATE-01",
+      "package_profile": "full-offline-v16.0.1"
+    }
+  },
+  "rollback": [
+    "restore the backed-up hlcc-jd-candidate.service",
+    "restart the previous immutable release",
+    "retain repository content and authentication state",
+    "retain the server-owned hot-repair receipts for manual recovery"
+  ],
+  "status": "ARCHITECTURE_PACKAGE_READY · INITIAL_PROVISION_PENDING"
+}
diff --git a/server-tools/hololake-code-channel/jd-candidate/hlcc-bootstrap.py b/server-tools/hololake-code-channel/jd-candidate/hlcc-bootstrap.py
index 3a35229..6e3bb5d 100644
--- a/server-tools/hololake-code-channel/jd-candidate/hlcc-bootstrap.py
+++ b/server-tools/hololake-code-channel/jd-candidate/hlcc-bootstrap.py
@@ -482,8 +482,9 @@ def seed_fifth_domain_channel(binary: pathlib.Path) -> str:
 
 def configure_shared_channel_repository(
     repository: pathlib.Path = CHANNEL_REPOSITORY_PATH,
+    generated_hook: pathlib.Path | None = None,
 ) -> str:
-    """Use Git's native shared-repository mode instead of a post-receive chmod."""
+    """Use sandbox-compatible native sharing instead of post-receive chmod."""
     if not repository.is_dir():
         raise RuntimeError("channel repository path unavailable")
 
@@ -494,7 +495,7 @@ def configure_shared_channel_repository(
             str(repository),
             "config",
             "core.sharedRepository",
-            "group",
+            "0660",
         ],
         check=True,
         capture_output=True,
@@ -513,7 +514,7 @@ def configure_shared_channel_repository(
         capture_output=True,
         text=True,
     ).stdout.strip()
-    if configured not in {"1", "group"}:
+    if configured != "0660":
         raise RuntimeError("shared repository configuration verification failed")
 
     obsolete_hook = (
@@ -530,6 +531,23 @@ def configure_shared_channel_repository(
             raise RuntimeError("obsolete sharing hook identity mismatch")
         obsolete_hook.unlink()
 
+    generated_hook = generated_hook or (
+        STATE_ROOT / "data" / "data" / "home" / "hooks" / "post-receive"
+    )
+    if not generated_hook.is_file() or generated_hook.is_symlink():
+        raise RuntimeError("generated post-receive hook path unavailable")
+    generated_text = generated_hook.read_text(encoding="utf-8")
+    unsafe_test = 'if [ $(basename "${hook}") != "gitea" ]; then'
+    safe_test = 'if [ "$(basename "${hook}")" != "gitea" ]; then'
+    if unsafe_test in generated_text:
+        generated_hook.write_text(
+            generated_text.replace(unsafe_test, safe_test, 1),
+            encoding="utf-8",
+        )
+        generated_hook.chmod(0o700)
+    elif safe_test not in generated_text:
+        raise RuntimeError("generated post-receive hook identity mismatch")
+
     return "configured"
 
 
diff --git a/server-tools/hololake-code-channel/jd-candidate/native.test.js b/server-tools/hololake-code-channel/jd-candidate/native.test.js
index bd6438f..d1cbff1 100644
--- a/server-tools/hololake-code-channel/jd-candidate/native.test.js
+++ b/server-tools/hololake-code-channel/jd-candidate/native.test.js
@@ -48,8 +48,10 @@ assert.match(bootstrap, /access_tokens_migrated": False/);
 assert.match(bootstrap, /repositories_migrated": False/);
 assert.match(bootstrap, /delete from access_token/);
 assert.match(bootstrap, /core\.sharedRepository/);
-assert.match(bootstrap, /"group"/);
+assert.match(bootstrap, /"0660"/);
 assert.match(bootstrap, /obsolete sharing hook identity mismatch/);
+assert.match(bootstrap, /generated post-receive hook identity mismatch/);
+assert.match(bootstrap, /basename "\$\{hook\}"/);
 assert.match(bootstrap, /configure_shared_channel_repository\(\)/);
 assert.doesNotMatch(
   bootstrap,
diff --git a/server-tools/hololake-code-channel/jd-candidate/test_owner_migration.py b/server-tools/hololake-code-channel/jd-candidate/test_owner_migration.py
index 75cdf80..2b6cf0a 100644
--- a/server-tools/hololake-code-channel/jd-candidate/test_owner_migration.py
+++ b/server-tools/hololake-code-channel/jd-candidate/test_owner_migration.py
@@ -150,9 +150,14 @@ class SharedRepositoryTests(unittest.TestCase):
                 "#!/bin/sh\nprintf '%s\\n' post_receive_permissions_reconciled\n",
                 encoding="utf-8",
             )
+            generated_hook = pathlib.Path(temporary) / "generated-post-receive"
+            generated_hook.write_text(
+                '#!/usr/bin/env bash\nif [ $(basename "${hook}") != "gitea" ]; then\n  :\nfi\n',
+                encoding="utf-8",
+            )
 
             self.assertEqual(
-                MODULE.configure_shared_channel_repository(repository),
+                MODULE.configure_shared_channel_repository(repository, generated_hook),
                 "configured",
             )
             configured = subprocess.run(
@@ -168,8 +173,12 @@ class SharedRepositoryTests(unittest.TestCase):
                 capture_output=True,
                 text=True,
             ).stdout.strip()
-            self.assertIn(configured, {"1", "group"})
+            self.assertEqual(configured, "0660")
             self.assertFalse(hook.exists())
+            self.assertIn(
+                'if [ "$(basename "${hook}")" != "gitea" ]; then',
+                generated_hook.read_text(encoding="utf-8"),
+            )
 
     def test_refuses_unknown_hook_content(self) -> None:
         with tempfile.TemporaryDirectory() as temporary:
@@ -178,9 +187,14 @@ class SharedRepositoryTests(unittest.TestCase):
             hook = repository / "hooks" / "post-receive.d" / "guanghu-ice-heart-share"
             hook.parent.mkdir(parents=True)
             hook.write_text("#!/bin/sh\nexit 0\n", encoding="utf-8")
+            generated_hook = pathlib.Path(temporary) / "generated-post-receive"
+            generated_hook.write_text(
+                '#!/usr/bin/env bash\nif [ $(basename "${hook}") != "gitea" ]; then\n  :\nfi\n',
+                encoding="utf-8",
+            )
 
             with self.assertRaisesRegex(RuntimeError, "identity mismatch"):
-                MODULE.configure_shared_channel_repository(repository)
+                MODULE.configure_shared_channel_repository(repository, generated_hook)
             self.assertTrue(hook.exists())
 
 
diff --git a/server-tools/lake-lamp-authz/README.md b/server-tools/lake-lamp-authz/README.md
index 49f3f1d..a6d8d00 100644
--- a/server-tools/lake-lamp-authz/README.md
+++ b/server-tools/lake-lamp-authz/README.md
@@ -125,9 +125,10 @@ node server-tools/lake-lamp-authz/authorize-repo-push.js \
   `safe.directory`，不得使用通配符。
 
 光湖代码频道本身保留 `UMask=0077`，以免放宽数据库和其他状态目录。对需要由直达
-接收器共同读写的精确裸仓库设置 Git 原生 `core.sharedRepository=group`，让新建的
-`objects` 与 `refs` 从写入时就继承专用共享组权限。不要安装推送后递归 `chmod` 的
-钩子，也不要为了共享一个裸仓库而修改整个代码频道服务的 UMask。
+接收器共同读写的精确裸仓库设置 Git 原生 `core.sharedRepository=0660`。数值模式让
+新建文件对专用共享组可读写，同时不会要求安全沙箱禁止的 setgid 操作。部署分支使用
+不含斜杠的扁平名称，避免由代码频道服务临时创建新的私有引用目录。不要安装推送后递归
+`chmod` 的钩子，也不要为了共享一个裸仓库而修改整个代码频道服务的 UMask。
 
 部署后用当前主分支生成无变化验收 bundle，经 `receiveBundle` 完整执行一次；验收前后
 主分支 SHA 必须一致，并且代码频道账户与授权服务账户执行 `git fsck` 均通过。